Create Function counterparts to some of the iteration methods

[sebersole]

Create Function counterparts to some of the iteration methods. E.g.

interface AnnotationTarget {
    ...

    @FunctionalInterface
    interface AnnotationUsageProcessor<T> {
        T process(AnnotationUsage<? extends Annotation> annotationUsage);
    }

    default <T, A extends Annotation> T fromAnnotations(
            Class<A> annotationType,
            AnnotationUsageProcessor<T> handler);
}